施工监控状态下病害闸拱桥的拆除  

Demolition of Diseased Gate Arch Bridge Under Construction Monitoring

作　　者：陈旭勇 周扬 杨宏印 CHEN Xuyong;ZHOU Yang;YANG Hongyin(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430074,China)

机构地区：[1]武汉工程大学土木工程与建筑学院

出　　处：《武汉工程大学学报》2019年第4期375-379,共5页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(51708429);武汉工程大学科学研究基金(K201734);桥梁结构健康与安全国家重点实验室开放课题(2017-04-GF)

摘　　要：闸桥作为一种具有特定功能的桥梁,兼备交通通行与蓄水泄洪功能。某23孔实腹式圬工闸拱桥通过桥梁检测及专家评审,确定利用桥墩、桥台、基础等下部结构,拆除主拱圈、填料、桥面系等上部结构。为保证桥梁安全,提出2种拱上填料挖除方案进行比选,通过计算分析,确定扰动较小的方案。采用建桥逆工序拆除法逐步卸除上部结构,并结合施工监控,形成拆除过程预警机制。最后,施工监控结果符合预期理论分析,整个拆除过程安全有序。The gate bridge has functions of both traffic and water storage. According to bridge inspection and expert evaluation,it was determined to continuously use the substructures,such as piers,abutments and foundations,and to demolish the superstructure such as main arch rings,fillers and bridge deck system in a solid-web masonry gate arch bridge with 23 spans. By theoretical analysis and comparing two kinds of fillers excavation schemes,the one with less disturbance was chosen to ensure the safety of the substructure in the demolition process,and then the superstructure was gradually demolished by the reverse process demolition method. During the demolition process,an early warning mechanism was formed. Finally,the results of construction monitoring were consistent with the expected calculations and analysis,and the whole demolition processwerefinishedsafely.

关 键 词：连拱拱桥 闸桥 拆除 施工监控 

分 类 号：U44[建筑科学—桥梁与隧道工程]